He was born in Sopron on 22.03.1859.
Studied at the Tecnhincal University in Vienna 1876-81 and then worked in the atelier of F.Fellner and H.Helmer, and later with F.Schmidt, of whom he adopts the implementation of eclecticism-historical styles. At the invitation of the Bosnian government he comes in 1883 to Sarajevo, where he spent the greater part of life and was a leading figure in architecture.
In his works are dominated Historicism and eclecticism, and later occur the elements of Vienna Art Nouveau. In his projects he goes from pseudo-romantic to pseudo-oriental shapes. He studied the Bosnian local architecture and tried, by applying its characteristic elements to implement “Bosnian style”. He was unusually productive.
During his time in Bosnia between 1883-1921 he built 102 residential houses, 70 churches, 12 schools, 10 banks, 10 palaces, 10 government municipal buildings, 6 hotels and taverns, and performed a series of remodeling. Worked drafts for alters and for the residential and ecclesiastical interiors. As a representative in Bosnian-Herzegovinian Parliament he submitted in 1911 resolution on the protection of cultural monuments in B&H.
He has written several studies about the Bosnian folk and urban architecture. From 1921 he lived in Zagreb. He contributed to the urban development of Sarajevo by providing guidelines for the construction of the space around the building of today Executive Council (the Presidency), the fourth Koševo, and directions for the Strossmayer Street which today still represents most compact urban area of that time.
His main works were Neo-Gothic Cathedral (1884-89), neo-Renaissance palace of the Local Government (now the Presidency), the Hotel Europe and Ajas-Pashas palace in Sarajevo, pseudo-folklore pavilion of Bosnia and Herzegovina on the Millenial Exhibition in Budapest (1896), the palace of the First Croatian savings bank in Zagreb (1898-1900), the palace Normann in Osijek, and the Hotel Union and the City savings Bank and Savings bank in Ljubljana.
He died in Zagreb 15.12.1932.